docs: def customize_lexer_priority(file_name, accuracy, lexer):
      """Customize lexer priority"""
  
      priority = lexer.priority
  
      lexer_name = lexer.name.lower().replace('sharp', '#')
      if lexer_name in LANGUAGES:
          priority = LANGUAGES[lexer_name]
      elif lexer_name == 'matlab':
          available_extensions = extensions_in_same_folder(file_name)
          if '.mat' in available_extensions:
              accuracy += 0.01
          if '.h' not in available_extensions:
              accuracy += 0.01
      elif lexer_name == 'objective-c':
          available_extensions = extensions_in_same_folder(file_name)
          if '.mat' in available_extensions:
              accuracy -= 0.01
          else:
              accuracy += 0.01
          if '.h' in available_extensions:
              accuracy += 0.01
  
      return (accuracy, priority, lexer)